256 ACHATINELLA CURTA. 



series of curta in several color-forms, which he took in the 

 bottom of Anahulu valley. This is as far west as real curta 

 has been found, so far as I know. 



Laie. A series of 15 specimens, all of the typical curta 

 pattern, was taken by Mr. Spalding. One is figured on pi. 

 46, fig. 5. This is the only record of curta from the north 

 side of the main range, unless we include Gulick's A. con- 

 tracta, which is not really distinguishable from some 

 Wahiawa undulata in which the streaks are nearly or quite 

 obsolete. On account of its locality I have left contracta 

 with the dimorpha group of forms. 



The original descriptions of undulata and rhodoraphe 

 follow. 



"Achatinella undulata. Shell sinistral or dextral, rather 

 solid, acutely conical, shining, polished; with longitudinal 

 oblique fine striae; microscopically spirally striate. Whorls 

 6, rounded and margined above ; suture well impressed. Aper- 

 ture subovate; columella short and plicately twisted; lip 

 acute, thickened within. Color light olive alternating with 

 slightly undulating chestnut lines and bands, rarely marked 

 by transverse black fasciae. Columella and aperture white. 

 Length 12, width 6 twentieths of an inch. Waialua, Oahu" 

 (Newc.). 



"Achatinella rhodoraphe Sm. Shell sinistral, shortly ovate- 

 conic, imperf orate, glossy, striated with growth lines and (un- 

 der a lens) very fine transverse striae; yellow, encircled below 

 the suture with a wide zone of pale rose. Whorls 6, convex, 

 the first three white; suture distinctly margined. Aperture 

 white ; margin of the peristome acute, bordered within ; colu- 

 mellar fold strong, rose (sometimes white). Length 15, diam. 

 Sy 2 . Var. : Shell yellow, suture zoned with chestnut below. 



Station: on trees. The metropolis of the species is Hele- 

 mano, on Oahu. It is also found in Ahonui, Wahiawa, 

 Opaiula and Kawailoa. It is related to A. livida Swn. and 

 A. curta Nwc., but is easily distinguished from either. This 

 species is always sinistral" (Smith). 



A. curta delta Gulick. PL 45, figs. 17 to 22. "Shell sinis- 

 tral, imperforate, conic, obliquely truncated at the base, solid, 

 shining, striated, yellow at the base, paler above, with 2 or 3 

 ash-brown bands; apex rather obtuse, white; spire conic; 

 suture marginate, lightly impressed ; whorls 5%> slightly con- 



